Application Note 040

“Solid State Relays vs. Electromechanical Relays”

http://www.ssousa.com/appnote040.asp

Introduction:

In a relay’s most basic function, the switching of a load circuit is controlled by a low power, electrically isolated input signal. In the past, Electromechanical Relays (EMRs) have been the component of choice, largely due to price, function, and availability. Now, however, the emergence of semiconductor technology has provided the means to manufacture solid state relays (SSRs) which in many applications, outperform their predecessors.